[PATCH 00/15] weston scaling support

[Pekka Paalanen]

On Thu, 23 May 2013 10:55:08 +0200
Alexander Larsson <alexl at redhat.com> wrote:

> On ons, 2013-05-22 at 20:36 -0500, Jason Ekstrand wrote:
> 
> 
> > I hate to rain on the parade, but it's not going to be that simple.  I
> > already tried adding a field to wl_resource and, as it currently
> > stands, it causes major issues.  As a reminder, this is because
> > wl_buffer has a wl_resource field which means that altering
> > wl_resource breaks binary compatibility for EGL implementations.
> >
> > I've been trying to figure out how to do this with my java stuff and I
> > really think adding a version flag to wl_resource is the way to do it.
> > Unfortunately,  but it's not going to be easy.
> 
> Both wl_resource and wl_buffer are server internals though. And the
> server API/ABI is not yet frozen. (In fact we just massively broke it.)
> 
> wl_buffer does appear in the client header, but just as a declaration,
> not the type definition.
> 
> So, this doesn't necessary seem that hard.

libEGL contains server-side code, too, for implementing
EGL_WL_bind_wayland_display.

http://cgit.freedesktop.org/mesa/mesa/tree/src/egl/wayland/wayland-drm/wayland-drm.h

struct wl_drm_buffer will break.

I'm beginning to think maybe we should simply fordib embedding a struct
wl_resource, to make it future proof. In the future.


Cheers,
pq